General notes on building MySQL from source on IBM AIX:
xlC detection is missing from
Autoconf, so a number of variables need to be set before
running configure. The following example
uses the IBM compiler:
export CC="xlc_r -ma -O3 -qstrict -qoptimize=3 -qmaxmem=8192 " export CXX="xlC_r -ma -O3 -qstrict -qoptimize=3 -qmaxmem=8192" export CFLAGS="-I /usr/local/include" export LDFLAGS="-L /usr/local/lib" export CPPFLAGS=$CFLAGS export CXXFLAGS=$CFLAGS ./configure --prefix=/usr/local \ --localstatedir=/var/mysql \ --sbindir='/usr/local/bin' \ --libexecdir='/usr/local/bin' \ --enable-thread-safe-client \ --enable-large-files
The preceding options are used to compile the MySQL distribution that can be found at http://www-frec.bull.com/.
If you change the
in the preceding configure line, you must
also remove the
-qstrict option. This is a
limitation in the IBM C compiler.
If you compile MySQL with gcc, you
must use the
-fno-exceptions flag because the exception
handling in gcc is not thread-safe. There
are also some known problems with IBM's assembler that may
cause it to generate bad code when used with
If you have problems with signals (MySQL dies unexpectedly under high load), you may have found an OS bug with threads and signals. In this case, you can tell MySQL not to use signals by configuring as follows:
CFLAGS=-DDONT_USE_THR_ALARM CXX=gcc \ CXXFLAGS="-felide-constructors -fno-exceptions -fno-rtti \ -DDONT_USE_THR_ALARM" \ ./configure --prefix=/usr/local/mysql --with-debug \ --with-low-memory
This does not affect the performance of MySQL, but has the side effect that you cannot kill clients that are “sleeping” on a connection with mysqladmin kill or mysqladmin shutdown. Instead, the client dies when it issues its next command.
On some versions of AIX, linking with
getservbyname() dump core. This is an AIX
bug and should be reported to IBM.